Oil-well casing



Aug. 7, 'E923 H. C. CABLE OIL WELL GASING "Wm up atm abusa i@ fue@ n Wm mm a man paws@ m Well.

waren @as 1 maladie@ (am wmmmly used the l @r Emmmm sth@ joims 15in imm M i Wml @Mmmm gammes; l@ in ich@ auch or compl@ pulling @am img shawn im 4.

(Cf L a second bead or rib 18 is formed on the opposite side of the abutting ends of the pi e 12 to that previously beaded.

e now have a length of casing composed of two outer and one inner sections of pipe, with the outer sections extending beyond the vinner section one-half its length, into which is placed an inner section, the ends of the inner sections abutting. The sections are then riveted and beaded on both sides of the abutted edges. A casing of any desired length may be fabricated by alternately assembling the sections as described.l

While l have shown and described the sections as being fabricated by riveting the outer and inner pipes together, it is to be understood that such riveting is not entirely essential as the outer and inner pipes may be secured to each other solely by the bead- 'ing heretofore described.

I claim as my invention:

1. An oil well casing comprising: a series of inner sections of substantially the same diameter placed with their ends abutting; a

vseries of outer sections of the same dia-meter but of a slightly larger diameter than said inner sections placed with their ends abutting the joints between the inner sections being staggered with relation to the joints between the outer sections two rows of rivets for each joint each of said rivets passing through one of said inner sections and one of said outer sections and being counter-sunk on the inner side of said casin and a series of annular ribs each formed by increasing the diameter of the material of said inner and outer sections which are thereby locked together, the casing being of substantially uniform diameter for a sutlicient distance between sald ribs, to allow space for the attachment of an elevator. l

2. An oil well lcasing comprising: a series of inner sections of substantially the same diameter placed with their ends abutting; a series of outer sections of the vsame diameter but of slightly larger diameter than said inner sections placed with their ends abutting, the joints between the inner sections being staggered with relation to the joints between the outer sections; and a series of annular ribs each formed by increasing the diameter of the material of said inner and outer sections which are thereby locked together, the casing being of substantially uniform diameter for a suiicient distance between said ribs, to allow space for the attachment of an elevator.

- In testimony whereof, I have hereunto set my hand at s 'Angeles, California, this 31st day of August, 1921.

HARRY C. CABLE. 

